IBM x3100 M5 Type 5457 Installation And Service Manual page 332

Figure 236. Pushing external input/output connectors out of chassis for 5U server model with
hot-swap power supplies
14. Grasp the system board by the edges; then, carefully lift up the system board
Figure 237. System board removal for 5U server model with hot-swap power supplies
15. If you are instructed to return the system board, follow all packaging
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System x3100 M5 Type 5457: Installation and Service Guide
and remove it from the chassis, being careful not to damage any surrounding
components.
instructions, and use any packaging materials for shipping that are supplied
to you.
Attention: Make sure to place the socket covers for the microprocessor
sockets on the system board before returning the system board.